Grinding or polishing cone.



Patented lan. I4, |902.

(Application filed 'May 10, 1901.)

No. esmas.

(No Model.)

we NoRms paens co` PHoTn-Ln'uo. wAsHmmcN, n c

rtree.

ttln'trn rares .ernaar HENRY O. MILLER, JR., OF IIAZLETON, PENNSYLVANIA,ASSIGN OR OF ONE- HALF TO PETER J. MILLER, OF HAZLETON, PENNSYLVANIA.

GRINDING OR POLISHING GONE.

SPECIFICATION forming part of Letters Patent No. 691,066, dated January14, 1902. Application ld May 10,1901. Serial No. 59,663. (No-modem T @ZZwwmf t Hwy COW/067%: bendable, so as to conform and effectually Be itknown that I, HENRY O. MILLER, Jr., operate on the surface against whichit is a citizen of the United States, residing at IIa- `brought to bear.Against the outer end of zleton, in the county of Luzerne and State ofthe core and the coiled strip 2 thereon a card- 53 5 Pennsylvania, haveinvented a new and useboard or other suitable cover 5 is applied and fulGrinding or Polishing Cone, of which the secured by any practicablemeans to keep following is a specification. the strip laminze in closerelation, and on the This invention relates to a grinding and said coveris externally applied a disk head polishing cone for treating oroperating upon 6, which has an abrading-surface, as shown, 6o Io dentalplates; and the objectin View is to faand is at times used for polishingor smoothcilitate the finishing of dental plates which ing portions ofthe plate, if desired, and found carry teeth by a simple and effectiveyieldnecessarythatsuch angular abrading-surface ing cone structure of aparticularly nature be employed. The cover 5 and head b' have andeconomical and cheap character. openings 7 in the center thereof, whichaline 65 The invention consists in the construction with each other andcoincide with the bore of and arrangement of the several parts, whichthe core l. will be more fully hereinafter described and The deviceisadapted to be applied to .a lathe claimed. mandrel or screw, as shownby Fig. 2, the

In the drawings, Figure l is a perspective cork core setting up a tightfrictional engage- 7o zo view of a cone structure embodying the feamentwith the end of said mandrel or screw to tures of the invention. Fig. 2is a longitudipreventtheentire devicefrom turning,andthe nal verticalsection of the same shown apdirection of rotation ot' the mandrel orscrew plied to a rotatable portion of a dental lathe will be the same asthe direction of winding or analogous device. Fig. 3 is a transverse ofthe strip. The mandrel or screw will be a 7; 2 5 vertical sectionthrough the core end of the part of a lathe usually employed bydentistsdevice. Fig. et is a detail elevation o'f one of and driven either byfoot or motive power, the end covering devices. Fig. 5 is aplan or ifthe device be used for other than dental view of a portion of the stripremovably apoperations any other suitable rotating device plied to theimproved device and having an maybe used forimparting motion to thecone. 8o 3o abrading-surface. After one exposed circumferential lengthbe- Similar numerals of reference are em ployed comes worn out it isremoved to expose a new toindicate corresponding parts in the severalsurface by uncoiling a suitable length of the views. strip, and thisoperation will be continued The improved device comprises a tubularuntil the strip length has been completely ex- 85 core 1, of cork, andthereon is wound a strip hansted.

2, of sand or emery paper, the core being con^ The preferred use of thedevice is in considerably less in length than the device as an nectionwith dental plates carrying teeth. entirety. The strip 2 is o'f the formshown by After the impression of the mouth is taken Fig. 5 and has oneedge 3 straight and the the teeth are edged up and flasked, vulcan- 9o4o opposite edgetobliquely cut, thestripgraduized, &c., and aftervulcanization the plate ally increasing in Width to it's maximum diistaken from the flask and Washed. The mension in width from the extremitydirectly plate will show more or less excess of rubber, engaging thecore to the outer end of the same, which is taken off by a coarse fileand the inand consequently as the coiled laminae are apside scrapedafter filing. There will be ridges 95 plied they gradually increase inprojection or scratches left in the plate, and the imfrom the inner endof the core and extend beproved device is set in motion and the plateyond successive adjacent edges, and thereby is brought to bear againstthe flexible or bendproduce a conical hollow portion converging ableportion thereof, so that a conformity will toward the core end. Thisconstruction probe had by the cone or improved device with roo 5o videsa grinding or polishing device having relation to the plate contour toremove said the greater portion thereof flexible or freely ridges orscratches, and after a short operation of this character the plate willbe ready for the iinal polishing operation.

The improved device can be made in various sizes and will prove avaluable addition to the particular art t0 which it is speciallyadapted.

I-Iaving thus described the invention, what is claimed as new is- 1. Adevice of the class set forth, comprising a core, and a strip ofabrading material Wound thereon,the said striphavingastraight edge andan oblique edge whereby one extremity of the device Will be iieXible orfreely bendable to conform to the contour of the surface against whichit is brought to bear.

2. A device of the class described, comprising a tubular cork core, anabrading-strip Wound thereon and having one straight edge and anopposite oblique edge to regularly,

project the laminze of the strip successively 2o vopposite end toprovide a iieXible extremity.

In testimony that I claim the foregoing as my own I have hereto axed mysignature in the presence of two Witnesses.

Y HENRY C. MILLER, JR.

Witnesses:

H. W. HEIDENREICH, C. C. SCHNEIDER.

